Fixed the AccentColorRepro sample to work with the new ThemeManager.
Fixed issue with Show Message Dialog not respecting Use Accent in the demo.
Fixed spacing issue.
Forgot the first setting of ColorScheme was needed for the result dialog.
Update readme.md
Merge pull request #1271 from Tide/DialogDemoFix

Message Dialog demo fix
Merge pull request #1265 from Tide/AccentColorRepoFix

Fixed the AccentColorRepro sample to work with the new ThemeManager.
Merge remote-tracking branch 'upstream2/master'